Capacity vs Needs
Portable power stations range from 300Wh (phone charging and laptops) to 5,000Wh (whole-home backup). Choosing the right size requires understanding your actual power consumption—not the marketing numbers on the box.
Our Testing Methodology
We tested 5 power stations with real-world loads: laptop charging (65W), mini fridge (45W), CPAP machine (30W), LED lights (10W), and a small TV (80W). We measured actual runtime vs claimed runtime, charging speed, and inverter efficiency.
Best for Camping: Jackery Explorer 1000 v2 ($899)
1,070Wh capacity powers a weekend camping trip for two: laptop charges (12x), phone charges (40+), LED lights (3 nights), and a mini fridge (18 hours). The 2,000W inverter handles most appliances. Solar charging with 200W panels takes 6 hours to full—practical for extended off-grid stays.
Best for Emergencies: EcoFlow Delta 2 Max ($1,299)
2,048Wh capacity with 2,400W output runs essential home appliances during outages: refrigerator (8 hours), CPAP machine (5 nights), WiFi router (24+ hours), and phone/laptop charging. The LFP battery chemistry lasts 3,000+ cycles (10+ years of weekly use). Expandable to 6kWh with extra batteries.
Best Budget: Anker 521 ($299)
256Wh capacity is perfect for day trips and charging electronics. Powers a laptop 3x, phone 15x, and a portable fan for 8 hours. Compact and lightweight at 8.2 lbs. The 300W inverter limits it to small electronics only.
Sizing Formula
List every device you'll power, note its wattage, and estimate daily hours. Total watt-hours per day = your minimum capacity. Add 20% buffer for inverter losses. For solar recharging, panel wattage × effective sun hours should exceed daily consumption.
